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Research and Innovation Department
Lane departure warning system
developed by PSA Peugeot Citroën
OICA Genève : 2005 march 11th
Jean-Christophe RIAT
© PSA Peugeot Citroën Page 2
Ü Car position supervision in the traffic lane§ warning of the driver when the car goes out
the traffic lane (result of drowsiness, careless mistake…)
§ no warning when the driver puts the turn indicator on
Ü System for motorways and express ways
Ü Two innovations in the system developed by PSA Peugeot Citroën :§ Sensor technology to detect the lane
§ HMI solution to warn the driver
Analogy with Virtual Rumble-Strips
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Functionality developed
© PSA Peugeot Citroën Page 5
Sensors integrationTo guarantee a robust detection for continuous and dashed lane, and to filter specific markings (directionnal arrow, town name,…) six sensors are integrated under the front bumper :
6 sensors
© PSA Peugeot Citroën Page 7
Sounds
Visual LED
Steering wheel
vibrationSeat
vibration
Ergonomic study
An ergonomic study was made in order to chose the best HMI (Human Machine Interface) :
© PSA Peugeot Citroën Page 8
Seat vibrations
Steering wheel vibrations
Sound signal
Attention
Emergency
Nature of the danger
Localisation of the dangerHelpfulness
Comfort
Clearness
Conclusion for the HMI
Ø Visual HMI is not suitable because we are not sure the driver sees it !
Ø Sound HMI is not suitable because it is too uncomfortable for the passengers
Ø Seat vibrations was chosen because it is easy to understand by the driver
© PSA Peugeot Citroën Page 12
System available on new Citroën cars
Citroën C4
Citroën C4 coupé
Citroën C5 Citroën C6
© PSA Peugeot Citroën Page 13
Conclusion
Ü Citroën proposes the first “lane departure warning system”available on cars in Europe (for the customer the price of the system is 390 €).
Ü We have chosen infrared sensors instead of video solution because this technology is less expensive and more robust in adverse weather conditions (rain, sun,…)
Ü A specific work has been made on the HMI in order to chose the best compromise for safety and to make the system acceptable by the driver and the other passengers in the car.